Control Panels Tab

Advanced Policy Settings Tab

Force Full Block Scan - Optionally check this option to mandate the start of a full block scan each time the replication is performed. If the option is not selected, then an automatic full block scan happens only under certain conditions. A full block scan compares the MD5 sum of all allocated blocks to perform the backup and get CDP back in synchronization. Read more in 3 Stages of CDP 3 Replication (Technical Papers).

Verify Checksums Server Side - Optionally enable this option to ensure that no data is lost during transporting. If this option is activated, then the Server side uncompresses, unencrypts if necessary and compares block packet MD5 with data sent from Agent. Verifying encrypted or unencrypted block checksums on the CDP Server allows you to triple check the integrity of a backup.

Exclude Known Disk Safes (Standard and Advanced Editions) - Optionally check this option to exclude the known Disk Safes from the replication to avoid backing up the same data twice.

Specify Backing File Location (Linux only) - Optionally define a path which the mount point of a device should use to store changed blocks. This option is useful to support backups of devices with low free space. By default, the Linux snapshot driver stores changed blocks (needed to maintain snapshots) in the the free space of the file system on which it is performing a snapshot. When using a server with multiple disks, storing snapshots on a separate dedicated disk can help reduce the load during backup. The disk must have a file system and must be mounted.

ExampleLinux system:

Mount Point

Disk

/dev/sda1

/boot

/dev/sda3

/

/dev/sda4

/var

When /boot or /var is 99.99% full, the backups fail because there is no free space to maintain the snapshot.
Once the user inputs "/" into the "Backing File Location" field, the /dev/sda3 path will be used as the changed block storage location for all file systems.

5. Click on "Create" in the bottom of the window to add the Policy to the "Policies" list.

6. You will receive a notification that the creation of the Policy was successful. Click OK.